In the trumpet sound wave experiment with Juliana and Asha, Asha heard the horn loudest when she was in a direct line from where the sound originated. What is the term for this type of wave? A) latitudinal B) longitudinal C) compressed D) diffracted
B) Longitudinal. Sound waves in air travel as longitudinal waves, where the vibrations (compressions and rarefactions) move in the same direction as the wave travels, so the sound is strongest along the direct line from the source.
What the observation is telling you
Asha hears the trumpet loudest when she is lined up directly in front of where the sound is coming from. That points to how sound travels through air, namely by pushing and pulling the air along the direction the wave moves.
How sound travels in air
A sound wave is a mechanical wave that needs a medium like air. The air particles vibrate back and forth, creating alternating regions of higher pressure (compressions) and lower pressure (rarefactions).
Matching the description to the wave type
In a longitudinal wave, particle motion is parallel to the direction the wave travels.
- Wave travels forward โ
- Air particles vibrate back and forth โ in the same line
That is exactly how trumpet sound moves through the room.
Eliminating the other choices
- A) latitudinal: not a standard wave type used for sound.
- C) compressed: compression is a part of a longitudinal wave, not the wave type itself.
- D) diffracted: diffraction is a behavior (bending/spreading) of waves, not the basic wave type of sound in air.
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